When you hover over a Master Release in the Home Portfolio view, the window contains a field "Sub releases in Product". However, it only displays the Products. The title is a bit misleading or can be interpreted a couple of different ways but it would be more valuable if it displayed both the product and corresponding sub-release name.
Thank you for your idea. Given historical support for this idea and other priorities, we are unlikely to implement changes here at this time. We hope you can understand.